linux-kernel - Re: [PATCH 06/10] mm: vmscan: Have kswapd writeback pages based on dirty pages encountered, not priority

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Message-ID: <514B4F9C.5040000@redhat.com>
Date:	Thu, 21 Mar 2013 14:21:16 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	Andi Kleen <andi@...stfloor.org>, Linux-MM <linux-mm@...ck.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	Zlatko Calusic <zcalusic@...sync.net>,
	Johannes Weiner <hannes@...xchg.org>,
	dormando <dormando@...ia.net>,
	Satoru Moriya <satoru.moriya@....com>,
	Michal Hocko <mhocko@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/10] mm: vmscan: Have kswapd writeback pages based on
 dirty pages encountered, not priority

On 03/21/2013 02:15 PM, Mel Gorman wrote:
> On Thu, Mar 21, 2013 at 01:53:41PM -0400, Rik van Riel wrote:
>> On 03/17/2013 11:11 AM, Mel Gorman wrote:
>>> On Sun, Mar 17, 2013 at 07:42:39AM -0700, Andi Kleen wrote:
>>>> Mel Gorman <mgorman@...e.de> writes:
>>>>
>>>>> @@ -495,6 +495,9 @@ typedef enum {
>>>>>   	ZONE_CONGESTED,			/* zone has many dirty pages backed by
>>>>>   					 * a congested BDI
>>>>>   					 */
>>>>> +	ZONE_DIRTY,			/* reclaim scanning has recently found
>>>>> +					 * many dirty file pages
>>>>> +					 */
>>>>
>>>> Needs a better name. ZONE_DIRTY_CONGESTED ?
>>>>
>>>
>>> That might be confusing. The underlying BDI is not necessarily
>>> congested. I accept your point though and will try thinking of a better
>>> name.
>>
>> ZONE_LOTS_DIRTY ?
>>
>
> I had changed it to
>
>          ZONE_TAIL_LRU_DIRTY,            /* reclaim scanning has recently found
>                                           * many dirty file pages at the tail
>                                           * of the LRU.
>                                           */
>
> Is that reasonable?

Works for me.
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